American Fire Sprinkler Association [http://www.firesprinkler.org/]
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AFSA Technical Update
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A newsletter dealing with codes and other technical issues
November 13, 2013
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Piping Above Electrical Equipment
We have an 8-inch main running though a main electrical room more than 6 ft
above
the transformer and other electrical panels. Can sprinkler pipe be installed
more
than 6 ft above electrical equipment?
We have reviewed NFPA 70, 2014 edition as the applicable standard. Our informal
interpretation is that if the piping is located above the dedicated space
greater
than 6 ft above the equipment, provisions must be made to protect the equipment
from condensation, leaks, or breaks.
Article 110.26(E)(1)(a) defines the dedicated electrical space as being the
space
equal to the width and depth of the equipment and extending from the floor to a
height of 6 ft above the equipment or to the structural ceiling whichever is
lower.
It further stipulates that no piping, ducts, leak protection apparatus, or other
equipment foreign to the electrical installation can be located in this zone.
For
instance, electrical conduit serving another piece of electrical equipment in
the
room is not permitted to pass through the dedicated space of the electrical
equipment
in question. Then (b) says the area above the dedicated space required by
110.26(E)(1)(a)
shall be permitted to contain foreign systems, provided protection is installed
to avoid damage to the electrical equipment from condensation, leaks, or breaks
in such foreign systems. Thus sprinkler piping, while not permitted in the
dedicated
space, are permitted above it as long as protection is installed to avoid damage
to the electrical equipment from condensation, leaks, or breaks.
Subsection (c) clarifies that sprinkler protection is allowed to be provided for
the dedicated space, but the piping must comply with this section, which is
essentially
(a) and (b). At first glance this appears to say that sprinkler system piping is
permitted to run through the dedicated electrical space above the equipment.
However,
closer examination of the wording reveals otherwise. It says that "protection"
is
permitted for the dedicated space, not "piping". So, the sprinkler and piping
may
be located such that the sprinkler will provide protection (spray water into)
for
the dedicated electrical space, but neither the piping nor the sprinkler may be
located in the dedicated space. They must either be located laterally out to the
side or above the dedicated space. Again, if the piping is located above the
dedicated
space, provisions must be made to protect the equipment from condensation,
leaks,
or breaks.
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Hosted by the American Fire Sprinkler Association
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Technical Update is prepared by the Technical Services Dept. of the AFSA: Vice
President
of Engineering and Technical Services Roland Huggins, a PE registered in fire
protection
engineering; Phill Brown, a NICET IV certified automatic sprinkler technician
and
NFPA Certified Fire Protection Specialist (CFPS) and Tom Wellen, a PE registered
in fire protection engineering. This is provided with the understanding that
the
AFSA assumes no liability for this opinion or actions taken on it and they are
not
to be considered the official position of the NFPA or its technical committees.
Copyright 2012, American Fire Sprinkler Association.
All Rights Reserved
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